/*
 *  Copyright 2009 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.javamapper.elements;

import java.util.List;
import java.util.Set;
import java.util.TreeSet;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.Interface;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class DeleteByPrimaryKeyMethodGenerator extends
		AbstractJavaMapperMethodGenerator {

	public DeleteByPrimaryKeyMethodGenerator() {
		super();
	}

	@Override
	public void addInterfaceElements(Interface interfaze) {
		Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
		Method method = new Method();
		method.setVisibility(JavaVisibility.PUBLIC);
		method.setReturnType(FullyQualifiedJavaType.getIntInstance());
		method.setReturnRemark("返回删除结果");
		method.addException(FullyQualifiedJavaType
				.getNewRuntimeExceptionInstance());
		method.setName(introspectedTable.getDeleteByPrimaryKeyStatementId());

		if (introspectedTable.getRules().generatePrimaryKeyClass()) {
			FullyQualifiedJavaType type = new FullyQualifiedJavaType(
					introspectedTable.getPrimaryKeyType());
			importedTypes.add(type);

			Parameter parameter = new Parameter(type, "key");
			parameter.setRemark("主键值");
			method.addParameter(parameter);

		} else {
			// no primary key class - fields are in the base class
			// if more than one PK field, then we need to annotate the
			// parameters
			// for MyBatis
			List<IntrospectedColumn> introspectedColumns = introspectedTable
					.getPrimaryKeyColumns();
			boolean annotate = introspectedColumns.size() > 1;
			if (annotate) {
				importedTypes.add(new FullyQualifiedJavaType(
						"org.apache.ibatis.annotations.Param")); //$NON-NLS-1$
			}
			StringBuilder sb = new StringBuilder();
			for (IntrospectedColumn introspectedColumn : introspectedColumns) {
				FullyQualifiedJavaType type = introspectedColumn
						.getFullyQualifiedJavaType();
				importedTypes.add(type);
				Parameter parameter = new Parameter(type,
						introspectedColumn.getJavaProperty());
				if (annotate) {
					sb.setLength(0);
					sb.append("@Param(\""); //$NON-NLS-1$
					sb.append(introspectedColumn.getJavaProperty());
					sb.append("\")"); //$NON-NLS-1$
					parameter.addAnnotation(sb.toString());
					parameter.setRemark("主键ID");
				}
				method.addParameter(parameter);
			}
		}

		context.getCommentGenerator().addGeneralMethodComment(method,
				introspectedTable, "根据主键删除记录");

		addMapperAnnotations(interfaze, method);

		if (context.getPlugins().clientDeleteByPrimaryKeyMethodGenerated(
				method, interfaze, introspectedTable)) {
			interfaze.addImportedTypes(importedTypes);
			interfaze.addMethod(method);
		}
	}

	public void addMapperAnnotations(Interface interfaze, Method method) {
		return;
	}
}
